Joseph A Pecar. The McGraw-Hill telecommunications factbook. New York: McGraw-Hill.
Trích dẫn kiểu ChicagoJoseph A Pecar. The McGraw-Hill Telecommunications Factbook. New York: McGraw-Hill.
MLA CitationJoseph A Pecar. The McGraw-Hill Telecommunications Factbook. New York: McGraw-Hill.
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